Initial revision

source/gameengine/Expressions/Expression.cpp

@@ -0,0 +1,75 @@
+// Expression.cpp: implementation of the CExpression class.
+/*
+ * Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Erwin Coumans makes no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ */
+
+
+
+#include "Expression.h"
+#include "ErrorValue.h"
+//#include "FactoryManager.h"
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+CExpression::CExpression()// : m_cached_calculate(NULL)
+{
+	m_refcount = 1;
+#ifdef _DEBUG
+	//gRefCountExpr++;
+#endif
+}
+
+CExpression::~CExpression()
+{
+	assert (m_refcount == 0);
+}
+
+
+
+// destuctor for CBrokenLinkInfo
+CBrokenLinkInfo::~CBrokenLinkInfo()
+{
+	if (m_pExpr && !m_bRestored)
+		m_pExpr->Release();
+}
+
+
+void CBrokenLinkInfo::RestoreLink()
+{
+
+	
+	assertd(m_pExpr);
+
+	if (m_pExpr)
+	{
+		if (!m_bRestored){
+			m_bRestored=true;
+			
+		}
+		if (*m_pmemExpr)
+		{
+			(*m_pmemExpr)->Release();
+		}
+		*m_pmemExpr = m_pExpr;
+		
+//		m_pExpr=NULL;
+	}
+}
+
+void CBrokenLinkInfo::BreakLink()
+{
+	m_bRestored=false;
+	m_pExpr->AddRef();
+}
+